Saw-setting device.



No. 820,572. PATENTED MAY 15, 1906. S. L. HAWN.

SAW SETTING DEVICE. APIPLIGATION FILED JAN. 24, 1905.

2 SHEETBSHEET l.

[NVQVTOR (army ANDREW u. GRAHAM co. wom-uruonmpnzas, wAsumsmn. n. c.

UNITED STATES PATENT OFFICE.

SAMUEL L. HAWN, OF ORISMAN, COLORADO, ASSIGNOR OF ONE-HALF TO ABRAHAM S.(JOAN, OF ORISMAN, COLORADO.

Specification of Letters Patent.

Patented May 15, 1906.

Application filed January 24, 1905- Serial No. 242,480-

To all whom it may concern:

Be it known that I, SAMUEL L. HAWN, a citizen of the United States,residing at Crisman, in the county of Boulder and State of Colorado,have invented certain new and useful Improvements in Saw-SettingDevices, of which the following is a specification, reference being hadtherein to the accompanying drawings.

My invention relates to saw-sets, and more particularly to that classhaving) automatic operating-hammers adapted to e actuated by fotpower,one of the objects being to provide a device of the character describedby means of which the blow applied to the saw-tooth is uniform andapplies with equal force on all parts of the tooth engaged by the hammeror setting-tool, thus obviating imperfect setting by reason of glancingor misdirected blows.

A further object of my invention is to provide a device of the characterdescribed whereby the force applied to the hammer may be so regulatedthat a light or heavy blow may be imparted to the saw-teeth, as desired.

A further object of my invention is to provide a device whereby asuitable setting-tool may be interposed between the hammer and thesaw-teeth.

Further objects and advantages of themvention, as well as the structuralfeatures by means of which said objects are attained, will be made clearby an examination of the specification, taken in connection with theaccompanying drawings, in which the same reference-numerals indicatecorresponding portions throughout, and in which Figure 1 is aperspective view of my complete invention, showing saw in dotted lines.Fig. 2 is a longitudinal section. Fig. 3 is a vertical transversesection of the device with parts dotted in to show the position of thetrigger and lever when the hammer is elevated. Fig. 4 is an end viewshowing the hammer, the setting-tool, and the adjustable rest for thesaw. Fig. 5 is a perspective view of the top plate. Fig. 6 is aperspective view of the trigger. Fig. 7 is a perspective view of theanvil. Fig. 8 is a perspective view of the guide-plate, and Fig. 9 is aperspective view of the setting-tool.

1 designates a bed-plate upon which my device is preferably mounted, and2 a vertical standard or cross-piece having an aperture '3 cut in thecenter thereof and bridged by the adjustably-mounted top plate 4, saidplate being somewhat wider than the crosspiece.

5 designates a block the top of which is brought to the level of thefloor of the aperture 3, and on this block is removably mounted aleaf-spring 6, to which is removably secured a hammer-head 7. interposedbetween the standard 5 and the leaf-spring 6 is a leather cushion 7which renders the spring less liable to break. A shorter leaf-spring 8is mounted on top of the spring 6 over the leather cushion for thepurpose of distributing the strain away from the point where the screws9 hold the same in place.

10 designates a setting-tool formed integral with a leaf-spring 1 1,removably mounted on a block 12, the setting-tool being arranged betweenthe hammer 7 and the anvil 13, said anvil being beveled, as shown at 14,which aids in securing the desired gage.

designates a plate having an opening 16, within which the anvil rests,and having two vertical projections 17 formed integral therewith andwhich are arranged on either side of the anvil and extend somewhat aboveit and act as a guide for the saw. This plate is adjustably secured bymeans of the screw 18 and the slot 19, so that when a large saw is usedthe plate can be pushed in toward the for the teeth and when a smallersaw is used the plate can be pulled outward away from the anvil, so thatso much room thereon will not be left for the teeth.

A plate 20 is adjustably mounted on the end of the bed-plate 1,preferably by means of the set-screw 21, the curved slot 22, and thepivoted links 23. One end of each of the links 23 is pivoted on theplate 20, and the other end is pivoted on the bed-plate 1, preferably byscrews 24. A kerf 25 is cut in the plate to permit it to drop over oneof the screws 24. When a wide set is desired, the set-screw 21 isloosened, and this plate is pushed downward, and'the saw 26, resting onthe plate, is carried down with it, so that the teeth on the bevelededge 14 of the anvil are brought into a more acute angle with the headof the anvil, and consequently when struck by the hammer or thesetting-tool are anvil in order that there may be more room bent at amore acute angle with the body of the saw and a wider set is obtained.If a narrow set is desired, the plate 20 can be raised to the desiredheight and there held securely in position by the set-screw 21. Whensaid plate is raised,'the teeth resting on the beveled edge of the anvilare brought into a less acute angle with the top of the anvil, andconsequently a narrower gage is obtained.

27 desi nates a foot-treadle pivoted on the sharpened spikes 28, whichrest on the floor. Connecting one end of the foot-treadle with theoutward end of the lever 28 is a chain 29. The lever 28 is pivotallymounted on the standard 2 and is provided with a stem or pin .30,engaged by a spring 31. The lower end of the trigger 32 is pivotallymounted on the said lever 28, and the upper end thereof is actuated bythe spiral spring 33. This trigger passes through an opening 34 in theleaf-spring 6, and the cam 35 on said trigger is adapted to engage theunder portion of said leaf-spring. he top plate 4 is provided with slots36 and is held in place by the set-screws 37, which are disposed withinthe slots and set in the cross-piece 2, and by means of which theposition of the plate may be regulated. The top plate is furtherprovided with an oblong slot 38 near its outer or overhanging edge, andthe upper end of the trigger, which is curved, is adapted to passthrough and travel within this slot and is held in close contact withthe plate at the end of the slot by means of said spiral spring 3-3.When pressure is imparted to the end of the foot-treadle connected withthe chain 29, the outward end of the lever 28 is drawn downward and theother end, on which the trigger 32 is pivotally mounted, is raisedagainst the tension of the s ring 31. The upper end of the trigger, wich, as before stated, is curved, bears against the plate at the end ofthe slot 38 and is gradually pushed to the right in its ascent andagainst the tension of the spiral spring 33. The cam 35 being inengagement with the under side of the leaf-spring. 6 forces said springupward, and thus elevates the hammer which is carried by the end of saidleaf-spring. The u per end of the trigger-is thus gradually pus ed tothe right until the cam is brought out of engagement with the leaf-sring 6, causing the spring to descend and the hammer to fall upon thesetting-tool 10, beneath which is arranged one of the teeth of the saw26, as shown in Fig. 1. The force of the blow is regulated thus by saidadjustable top plate 4. When said plate is moved to the right, the upperend of the trigger is consequently force more to the right in its ascentthan when the plate is moved to the left. When said plate is adjusted tothe left, the trigger assumes a more nearly vertical position, and hencewhen the lever 28 is actuated and the trigger forced upward "the cam 35is not brought out of engagement with the leafspring 6 until said springhas been raised higher than when the plate 4 is adjusted more to theright. As soon as the pressure on the outer end of said lever 28 isremoved the inner end of the lever is forced downward by means of saidspring 30 and the pin 31. By keeping one foot on the treadle andalternately imparting pressure to both ends thereof the successiveaction of the trigger is brought about, and consequently the ham- .meris kept in constant operation and thespeed thereof is entirely withinthe control of the operator.-

While a preferred embodiment of my invention has been illustrated, it isobvious that certain modifications of form and arrangement of parts willsuggest themselves to the skilled operator and mechanic; but suchmodifications come well within the spirit and scope of my invention asdisclosed and claimed, and I do not, therefore, desire to be restrictedor limited to the exact construction and arrangement shown.

In the drawings it will be noted that the hammer-head 7 is made separatefrom the leaf-spring 6 and secured thereto by screws. The object of thisform is to enable the harm Iner-head to be readily and easily removedwhen worn and a new one substitued; but, if preferred, the hammer-headmay be formed integral with the leaf-spring. The leafspring 11 may alsobe dispensed with by forming the setting-tool 10 integral with thehammer head or by securing it thereto.

The bed-plate 1, upon which my entire device is mounted, may be formedintegral with a work bench or table,- or it may be removably securedthereto by screws or other suit= able means.

Having thus described my said invention, what I claim as new, and desireto secure by Letters Patent of the United States, is

1. In a setting device, a hammer, a spring? handle therefor, acontrollingdever, a trigger pivotally mounted on said lever and having ashoulder to engage with the handle, a plate having a slot therein withinwhich the trigger is arranged to travel, and a spring secured to saidplate and arranged to hold the trigger against one wall of the slotwhereby the trig ger is caused to disenga e the hammer.-

2. In a saw-setting evice, the combine tion, with a suitable support,-and an anvil carried by said support, of a leaf-spring having one endmounted on the support, a saw settin tool formed integral with the otherend 0 said leaf-spring and thereby held sus pended over the anvil, asecond leaf spring having one endmounted on the support, a hammercarried by said second leaf spring, and means for automatically raisinand re: leasing said second leaf-spring and amrner.-

3. In a saw-setting device, a hammer, a spring-handle therefor, acontrollingdever, a-

spring for returning the lever to its starting position, a triggerpivotally mounted on said lever and having a shoulder engaging with thehandle whereby said handle is raised and released, a plate having a slotwithin which the trigger is arranged to travel, and a spring arranged tohold the trigger against one wall of the slot whereby the trigger iscaused to disengage the hammer.

4. In a saw-setting device, an anvil, a sawsetting tool movably mountedabove said anvil, a hammer mounted above the saw-setting tool andadapted to engage therewith, a hammer-head, a flexible handle for saidhammerhead, a support having one end of said handle rigidly securedthereto, a second support, a lever mounted thereon, a spring actuatingsaid lever, a trigger pivotally mounted on the lever and arranged tooperate the handle, a plate adjustably mounted on said second supportand having a slot therein within which the upper end of the trigger isarranged to travel, and a spring secured to said plate and arranged tohold said trigger in place.

5. In a saw-setting device, a suitablymounted bed-plate, a verticalcross-piece secured thereto, an anvil secured thereto, a setting-toolmovably mounted above the anvil, a hammer-head mounted above the anvil,a flexible handle for said hammer-head, a lever pivoted on thecross-piece, a spring secured to the bed-plate and arranged to controlone end of the lever, a trigger pivotally mounted on said lever andarranged to throw the handle into and out of operation, a plateadjustably mounted on said cross-piece and overhanging the same, a slotin said plate within which the upper end of the trigger is arranged totravel, a support rigidly secured to the bed-plate and having one end ofthe flexible handle rigidly mounted thereon, and a spring secured tosaid plate and to the upper end of said trigger and adapted to controlthe same.

6. In a saw-setting device, an anvil mounted on a suitable support, ahammer-head mounted above said anvil, a spring-handle having thehammer-head secured to one end thereof, a rigid support having the otherend of the handle mounted thereon, a second support, a lever pivotallymounted on said second support, a spring controlling one end of thelever, a trigger pivotally mounted on said lever and adapted to raiseand release the handle, a plate adjustably mounted on the top of saidsecond support and having a slot therein within which the upper end ofthe trigger is arranged to travel, a spring secured to said plate andarranged to control the upper end of said trigger, and means foractuating said lever.

In testimony whereof I hereunto affix my signature in presence of twowitnesses.

SAMUEL L. HAWN.

Witnesses:

HENRY A. DRUMM, E. E. BEoKErT.

